Preparation and Characterization of Cotton Textile Graft Copolymers as Cation Exchanger
Titel:
Preparation and Characterization of Cotton Textile Graft Copolymers as Cation Exchanger
Auteur:
Kh. M. Mostafa
Verschenen in:
Journal of applied sciences
Paginering:
Jaargang 5 (2005) nr. 3 pagina's 527-531
Jaar:
2005
Inhoud:
Acrylic Acid (AA) was graft copolymerized with cotton cellulose in fabric form to prepare poly (AA)-cotton graft copolymer cation exchanger using Fe2+/BrO3- redox system in aqueous medium under a nitrogen atmosphere. The effect of Fe2+, BrO3- and monomer concentrations, pH as well as time and temperature of polymerization were studied by determining the grafting parameters gravimetrically, like Graft Yield (GY %) and Graft Reaction Efficiency (GRE %). On the other hand, the newly prepared poly (AA)-cotton graft copolymers were characterized for different heavy metals ions removal to determined their suitability as cation exchanger. On the basis of a detailed investigation of the above factors, the appropriate conditions for grafting were as follows: Fe2+, 0.005 mol L-1; BrO3-, 0.001 mol L-1; pH, 2; monomer, (50% based on weight of substrate); time, 90 min and temperature, 35�C. On the other hand, the potential value of the newly prepared poly (AA)-cotton graft copolymer to serve as cation exchanger was assessed through measurements of critical properties such as removal of different heavy metal ions from their solutions as well as durability.
Uitgever:
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